Contents

The original United Kingdom and European cover depicts the Trifid Nebula in Sagittarius and displays neither the name of the band nor the title. The original United States and Canadian album cover (as released by Atlantic Records) was a Peter Sinfield painting of off-white with coloured "islands". This was used as an internal gatefold sleeve in the UK. When the King Crimson catalogue was re-issued by EG, they standardised on the "Trifid Nebula" cover world-wide.

The fifth release in King Crimson's 40th Anniversary series featuring new stereo and 5.1 surround mixes (by Steven Wilson and Robert Fripp), Sid Smith sleeve notes and copious extra tracks and alternative versions. The CD presents a complete stereo remix by Steven Wilson and Robert Fripp alongside a group of additional tracks representing a near complete alternative album of studio takes, run-throughs and mixes. The DVD-A presents a complete 5.1 surround sound mix by Steven Wilson, a hi-res stereo version of the 2010 mix, a hi-res stereo version of the original album mix taken from the 30th anniversary master source and almost 90 minutes of additional material, the vast majority of it previously unreleased, including many studio takes mixed from the original recording sessions specifically for this release. The material covers everything from early rehearsals of "Pictures of a City" (one of the final new songs performed by the 1969 lineup) to the previously unheard "A Peacemaking Stint Unrolls" (showcasing early ideas and elements that would appear in fully realised form on later KC albums), a fragment of Fripp playing the tune of "Islands" on a mellotron, a blistering live "Sailor's Tale" from the Zoom Club and much more.[1][2]

The harmonic basis for the tune "The Letters" is derived from the Giles, Giles and Fripp song "Why Don't You Just Drop In," available on The Brondesbury Tapes compilation.[3] The bridge section is also taken from the King Crimson version of the song, performed by the original line-up, titled simply "Drop In" and later released on the live-album Epitaph.

The basis for "Prelude: Song of the Gulls" is derived from the Giles, Giles and Fripp song "Suite No. 1".[3]

The original vinyl release of the album features a hidden track. At the end of side two there is a recording of studio chatter followed by Fripp saying, among other things, "...What we're going to do, umm... do it twice more, once with the oboe, once without it, and then... we finish." This was included on the initial CD release but was accidentally left off the first pressings of the 1989 Definitive Edition CD remaster. It was restored on all subsequent reissues.